Sharing type optical packet switching node structure based on inside wavelength

Abstract

The invention relates to a shared optical packet exchange node structure based on internal wavelength comprising wavelength-division demultiplexer, adjustable wavelength shifter, optic switch matrix, wavelength-division multiplex, optical fiber delay line, splitter, SOA light gate, passive coupler. Using a group of shared optical fibre delay line for solving competition of light grouping, and increasing optical buffer capacity by internal wavelength method, Solving FDL competition of shared optical cache; Each optical fibre delay line being degeneratively arranged, Each optical fibre delay line cache wavelength comprising transmission wavelength in input / output optical fiber, and also increasing proper internal wavelength to enlarge capacity of optical cache according to need, introducing extra internal wavelength to optical fibre delay line to enhance capacity of FDL optical cache; Node structure with compact appearance being simply controlled. Packet loss rate can be largely reduced for exchange node without increasing optical packet cache time delay, which effectively solves FDL competition problem of shared optical cache.

Description

technical field [0001] The invention relates to a shared optical packet switching node structure in the field of optical communication technology, in particular to a shared optical packet switching node structure based on internal wavelengths and suitable for optical packet switching networks. Background technique [0002] In recent years, the Internet business volume is growing exponentially, and IP services have become the main business of communication networks. At the same time, the Optical Transport Network (OTN) based on Wavelength Division Multiplexing (WDM) technology has been able to provide high-speed, large-capacity transmission bandwidth. However, the electrical layer IP network uses IP packets as the switching unit, and its services are highly bursty, while the optical transport network uses the entire optical wavelength as the transmission unit. How to map IP packets to optical wavelengths to realize effective utilization of transmission bandwidth resources ha...

AI Technical Summary

Problems solved by technology

[0005] The present invention is to provide a shared optical packet switching node structure based on internal wavelengths. By using additional optical wavelengths in the FDL optical buffer, the structure increases the capacity of the FDL optical buffer without increasing the buffer delay. Under the premise of , it can better solve the problem of node performance deterioration caused by FDL competition

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